Answer:

39 years old

Step-by-step explanation:

let x be kiel's age

Kiel : x

Marco : x-5

Father : (x-5) + 30

then if kiel is 14, substitute 14 in their father's age. (x-5) + 30 = (14-5) + 30 = 9 +30 = 39

therefore, their father is 39 years old if kiel is 14.

Answer:

39 Years

Step-by-step explanation:

Kiel 14

Marco 9

Father 39